Common Plant Diseases

Diseases such as canker, honey fungus, coral spot, and bacterial canker are all extremely serious and can infect plants and fruits alike. In most instances of disease, plants should be removed.
Related To:

©2008, Dorling Kindersley Limited

©2008, Dorling Kindersley Limited

©2008, Dorling Kindersley Limited

©2008, Dorling Kindersley Limited

©2008, Dorling Kindersley Limited

Rose Rust

Rose rust spots (here, in spring) shed fungal spores in the summer, and this is followed by leaf loss. Rusts are a large group of diseases, characterized by orangey spots or bumps.

Coral Spot

Coral spot causes pink/red spots that dot the bark of dead wood, but it can invade healthy shoots of many trees and shrubs. It must be cut out.

Hollyhock Rust

Hollyhock rust and other types of rust disease disfigure rather than kill plants. Choose resistant varieties, and keep plants in good health to help resist attacks.

Rose Black Spot

Rose black spot is a fungal disease that is prevalent in wet weather, spreading by water splash in wet, windy conditions. Regular treatment with a fungicide is required, but removing infected leaves and pruning out diseased wood also helps. Catalogs list roses that are more resistant to this disease than others are; while these are worth considering, no rose is completely immune.

Diseased Fruit

Diseased fruits and berries can persist on trees or the ground over winter, ready to release spores in spring. To prevent this, put them out for collection with yard waste, burn them, or bury them in a deep hole.

Next Up

Garden Plants and Flowers

Learn how to discover which plants underscore and help define a specific garden design style.

Plant a Rose and Perennial Garden

Create a contemporary display using disease-resistant roses and pretty perennials for a modern mix of flowers and foliage.

What to Plant in High- and Low-Maintenance Gardens

Choose plants for a garden design that will suit your lifestyle.

Plant Diseases

Use these tips to learn how to recognize signs of stress and disease in your plants.

Avoiding Pests and Disease in the Garden

Paul James reveals his secrets for controlling pest and disease problems.

Watering Lawns and Gardens

Thorough, careful watering encourages deep, drought-resistant roots in your lawn and garden. Follow the steps below to ensure best results.